How To Lead A Roof Valley

To secure the roof valley flashing nail it down carefully.

How to lead a roof valley.

The width of the open valley is dependent upon the roof pitch and the volume of water expected to drain into the gutter. Step 3 lay the flashing. Only nail at the edges with only enough nails to. Table 11 gives the minimum recommended valley widths for different roof pitches and plan areas.

Lead lined valleys the main elements that keep the water out are the upstands and welts at each side of the valley. Step 4 replace the shingles. The most common open width for a traditional valley is 125mm and this is generally satisfactory for normal domestic roofs. This acts as a last line of defence for water penetration.

Thin plywood linings are fitted over the valley boards to maintain a smooth finish under a lead lined valley. This video shows the traditional and best way to repair a lead valley on a roof. Step 1 find the cause. Bend a welt into the lead 25mm each side.

Starting at the bottom of the valley dress the lead neatly onto the valley boards and over the tilting fillets. Find the place where that leak is coming from. Then starting at the base of the. It also has the added benefit of stiffening the lead which makes carrying it up the roof a lot easier.

Step 2 remove the shingles. Many roof valley leaks are caused by roofing nails that have been poorly. To make matters worse the lead has been cut by what i presume was the disc cutter as tiles were cut in situ.